Koa'ki Meiru Bergzak

[ Warrior / Effect ] During each of your End Phases, destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Warrior-Type monster in your hand. If this card destroys an opponent's monster by battle, it can attack once again in a row. ATK/ 2000 DEF/ 200